import {z} from 'zod'

export type CreateApiApiV1ContextSearchSteerArgs = {mode?: ('fast' | 'standard') | undefined, context?: boolean | undefined, body: {user_id?: string | undefined, steeringPrompt?: string | undefined, query: string, similarity_threshold: number, minimum_similarity_threshold: number, scope?: ('internal' | 'external') | undefined, body_metadata?: ({fileName?: string | undefined, groupName?: Array<string> | undefined, lastModifiedAt?: string | undefined, modalities?: (Array<'text' | 'image'>) | undefined} | {[key: string]: unknown}) | undefined, magic_key?: (string | null) | undefined}};

export type CreateApiApiV1ContextSearchSteerOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiApiV1ContextSearchSteerResponse = z.object({answer: z.string(), context: z.string().optional(), usage: z.object({inputTokens: z.number().optional(), outputTokens: z.number().optional(), totalTokens: z.number().optional()})});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Search context and generate an LLM-powered answer
 * 
 * POST /api/v1/context/search/steer
 */
export const createApiApiV1ContextSearchSteer = async (args: CreateApiApiV1ContextSearchSteerArgs, options?: CreateApiApiV1ContextSearchSteerOptions) => {
const {baseUrl = "https://platform-backend.getalchemystai.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (args.mode != null) query.append("mode", String(args.mode))
if (args.context != null) query.append("context", String(args.context))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/context/search/steer${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiApiV1ContextSearchSteerResponse, await res.json())
};